euphotic


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Related to euphotic: photic, Photic zone

euphotic

(yo͞o-fŏt′ĭk)
adj.
Of, relating to, or being the uppermost layer of a body of water that receives sufficient light for photosynthesis and the growth of green plants.
References in periodicals archive ?
Transparency values for both the dry and rainy seasons indicated that waters were turbid at all collection points and the euphotic zone was reduced (Table 1).
nitrification) of organic matter that is produced in the euphotic zone and transported efficiently to the bottom of the reservoir (Nino & Guillot, 2004; O'Sullivan & Reynolds 2005; Boehrer & Schultze, 2008).
However, during the whole sampling period the Secchi disc depth measured was high, indicating that the euphotic zone always reached the sediment, favoring the germination of seeds in the diaspore bank.
Although the larvae can develop on a diet of unicellular algae, they cannot tolerate temperatures in the euphotic Zone where this food occurs.
These species prefer the upper part of the euphotic zone (Venec-Peyre et al.
In scallops, planktotrophy is known to be the dominant developmental mode in euphotic waters (especially for shallow-water species), whereas lecithotrophy may improve the chances of survival where suspended particulate food is limited (such as in caves or abysses) or where parental environment is extremely patchy (Cragg 2006).
Chlorophyll a concentrations were calculated for the euphotic zone (1.
Examples of effects are the enhancement of vertical mixing along the fairway that may intensify eutrophication effects and result in harmful algae blooms by causing the transport of nutrients from sediments into the euphotic layer [4], the enhanced resuspension of fine sediments and changes to the coastal processes in areas affected by ship wakes [1,3,5-7], and the direct impact on fish [8] and marine mammals [9].
About 300 of the terms are new or revised for this edition, including aragonite, biogeochemical cycling, euphotic zone, Global Ocean Observing System, International Polar Year, marine snow, sea ice biome, and trace metals.
2006) suggested that steady winds from the south re-suspend sediments from the shallow bottoms of the euphotic zone by creating upwelling of nutrient-rich waters.